Helios redwood grows on a bench above a creek that flows into Redwood Creek. Helios, Icarus, and Daedalus trees were identified as tall trees all on the same day, July 1, 2006. Helios is a fused multi stem redwood and is the oldest of the tall redwoods – a little over 2,000 years old. The very top of Helios is a reiteration arising from crown breakage about 100 years ago. At that time Helios was 390-400 feet tall.
The average diameter at 4.5 feet above average ground level is 16.0 feet.
Helios height was measured at 378 feet in 2018.
The 2015 height for Helios was was 377 feet.
Helios was measured at 374 feet when it was first identified in 2006.